
Maxim Integrated 20-19
MAX31782 User’s Guide
Revision 0; 8/11
RET Return from Subroutine
Description: RET pops a single word from the stack (@SP) into the Instruction Pointer (IP) and decrements the
stack pointer (SP). The decremented SP is saved as the new stack pointer (SP).
Status Flags: None
Operation: IP ← @ SP--
Encoding:
15 0
1000 1100
0000 1101
Example(s): RET
Code Execution:
Addr (IP) Op Code
0311h
...
0312h
RET
0103h
...
Stack Data:
xxxxh
xxxxh
0103h
← SP (before RET)
xxxxh
← SP (after RET)
xxxxh
RET C/RET NC, RET Z/RET NZ, RET S Conditional Return on Status Flag
Description: Performs conditional return (RET) based upon the state of a specific processor status flag. RET C
returns if the Carry flag is set while RET NC returns if the Carry flag is clear. RET Z returns if the
Zero flag is set while RET NZ returns if the Zero flag is clear. RET S returns if the Sign flag is set.
See RET for additional information on the return operation.
Status Flags: None
RET C C=1: IP ← @SP--
Operation:
C=0: IP ← IP + 1
Encoding:
15 0
1010 1100
0000 1101
Example(s): RET C ; C=1, return (RET) is performed
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